PM2 VS Koa

Run the application using PM2 (ref: Process manager for Node.js)

There are plenty of ways to accomplish this: Docker, Kubernetes, Pulumis, etc., but I don’t like to add too much complexity. So for a basic app, I like to use PM2, a Node.js process manager with great features, including the ability to run our app in the background.

This project will consist of a single "index.js" file that you can deploy anywhere. I recommend using an Nginx reverse proxy and pm2 to keep the service running.

Your app should be running now. To be able to run the app in the background, I will use pm2. Stop your application using "Ctrl + C" and install pm2

https://www.npmjs.com/package/pm2 I found this package. It looks good and solves my problem, I think.

Usually, you have something that restarts it for you. This is what a "process manager" is for, e.g. https://www.npmjs.com/package/pm2 But in most more advanced systems, this is taken care of for you differently. E.g. lambdas are restarted automatically based on how many instances are needed. If you are in container-land, there's usually a health check endpoint on your server that gets pinged by the container orchestrator, and if there's no response, it will kill and redeploy the container.

Since "Express.js is an old framework that has not evolved for a long time. It's not a good choice for new projects since it can easily lead to security issues and memory leaks." -- H3. Which is also the case for Koa.

In this example, we're using the serverless framework to quickly set up the Lambda function along with an API gateway for the entry point. The lambda function is a simple Koa REST API with a few functional endpoints.

The initial step is to create our entry point, from where the page will be rendered. In this case, we will use the koa framework.

Koa.js: By the team behind Express, Koa.js utilized async/await for middleware, resulting in cleaner and more readable code.

Koa

Koa.js: https://koajs.com/

Koa -Next Generation Node Microservice Framework

Backend is more tricky. - RESTful APIs I prefer Koajs - For a RPC/microsevice, I have only used gRPC - For a CLI, yargs and inquirer

There are lot of different frameworks out there. If you learn one, there is no guarantee that the next job you find will use the same. For example if you learn Express and the next one used Koa or Nest.

Koa.js is a minimal and flexible Node.js web application infrastruc­ture, which provides a robust set of features for web and mobile applica­tions. It is an open-source framework developed and maintained by the creators of Express.js, the most popular web framework for Node.js.